Patent
1979-04-02
1980-10-28
Henry, Jon W.
G02B 2717
Patent
active
042303940
ABSTRACT:
An all mirror facet tracking system including first and second spherical mirrors. Both of the mirrors can be located along the same system axis on opposite sides of a rotating multi-faceted polygon which has its axis of rotation on the system axis. To reduce coma, the spherical mirrors are located along orthogonal system axes and a flat folding mirror is provided between the two spherical mirrors to reduce the angle of incidence of the chief ray with the second spherical mirror.
REFERENCES:
patent: 3910675 (1975-10-01), MacGovern
Brueggemann Harry P.
Grafton David A.
Henry Jon W.
Xerox Corporation
Zalman Leonard
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